<template>
<div>
  <!--面包屑导航-->
  <el-breadcrumb separator="/">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item><a href="/users">商品管理</a></el-breadcrumb-item>
    <el-breadcrumb-item>添加商品</el-breadcrumb-item>
  </el-breadcrumb>

  <!--卡片视图-->
  <el-card>
    <!--提示区域-->
    <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
    </el-alert>

    <!--步骤条 激活项active-->
    <el-steps :space="200" align-center :active="activeIndex-0" finish-status="success">
      <el-step title="基本信息"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>

    <!--tab区域-->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
      <el-tabs @tab-click="tabClicked" tab-position='left' v-model="activeIndex" :before-leave="beforeTabLeave">
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
          </el-form-item>
          <!--级联选择器-->
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader clearable v-model="addForm.goods_cat" :options="cateList" :props="cateProps" @change="handleChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <!--渲染表单的item项-->
          <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
            <!--复选框组-->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
          <!--图片上传 action图片要上传到的api地址 list-type图片的呈现方式-->
          <el-upload :on-success="handleSuccess" :headers="headerObj" :action="uploadRUL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture">
            <el-button size="small" type="primary">点击上传</el-button>
            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <!--富文本编辑器组件-->
          <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          <!--添加商品的按钮-->
          <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>

  </el-card>
  <!--图片预览-->
  <el-dialog title="预览" :visible.sync="previewVisible" width="50%">
    <img :src="previewPath" alt="" class="previewImg">

  </el-dialog>
</div>
</template>

<script>
import _ from 'lodash'

export default {
  name: 'Add',
  data() {
    return {
      //控制步骤条进度 和控制tab位置
      activeIndex: '0',
      //添加商品的数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类
        goods_cat: [],
        //图片的数组
        pics: [],
        //商品详情描述
        goods_introduce: '',
        attrs: []
      },
      //表单验证
      addFormRules: {
        goods_name: [{
          required: true,
          message: '请输入商品名称',
          trigger: 'blur'
        }],
        goods_price: [{
          required: true,
          message: '请输入商品价格',
          trigger: 'blur'
        }],
        goods_weight: [{
          required: true,
          message: '请输入商品重量',
          trigger: 'blur'
        }],
        goods_number: [{
          required: true,
          message: '请输入商品数量',
          trigger: 'blur'
        }],
        goods_cat: [{
          required: true,
          message: '请选择商品分类',
          trigger: 'blur'
        }]
      },
      //商品分类列表
      cateList: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      //动态参数列表数据
      manyTableData: [],
      //静态参数列表数据
      onlyTableData: [],
      //上传图片的URL地址
      uploadRUL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件的header请求对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //图片路径
      previewPath: '',
      //显示对话框的隐藏显示
      previewVisible: false
    }
  },
  methods: {
    getCateList() {
      //发送分类请求
      this.$http.get('categories').then(res => {
        if (res.data.meta.status !== 200) {
          this.$message.error('获取分类参数失败！')
        }
        this.cateList = res.data.data
        console.log(res.data.data)
      })
    },
    //级联选择器变化回触发的函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat.length = []
      }
    },
    //可以阻止跳转 标签页tabs
    beforeTabLeave(activeName, oldActiveName) {
      // console.log("即将离开的标签页是 " + oldActiveName)
      // console.log("即将进入的标签页是 " + activeName)
      // return false
      //判断即将离开的名字是否是0 在判断分类的长度是否是3 不成立阻止跳转
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.success('请选择商品分类')
        return false
      }
    },
    //当前所在的标签页
    tabClicked() {
      // console.log(this.activeIndex)
      //访问的是动态参数面板
      if (this.activeIndex === '1') {
        this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        }).then(res => {
          if (res.data.meta.status !== 200) {
            return this.$message.error('获取动态参数列表失败')
          }
          console.log(res.data.data)
          res.data.data.forEach(item => {
            //空格分割成数字
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })
          this.manyTableData = res.data.data
        })
        //访问的是静态属性面板
      } else if (this.activeIndex === '2') {
        this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        }).then(res => {
          if (res.data.meta.status !== 200) {
            return this.$message.error('获取静态属性列表失败')
          }
          console.log(res.data.data)
          // res.data.data.forEach(item => {
          //   //空格分割成数字
          //   item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          // })
          this.onlyTableData = res.data.data
        })
      }
    },
    //处理图片预览事件
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //处理移除图片的操作
    handleRemove(file) {
      //1.获取将要删除的图片的临时路径  
      const filePath = file.response.data.tmp_path
      //2.从pics数组中 找到图片对象的索引值
      const i = this.addForm.pics.findIndex(x => {
        x.pic === filePath
      })
      //3.调用数组的splice方法把图片信息对象从pics 数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      //1.拼接得到的图片信息对象
      const picInfo = {
        pic: response.data.tmp_path
      }
      //2.将图片信息对象，push到 pics
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add() {
      // console.log(this.addForm)表单验证
      this.$refs.addFormRef.validate(valid => {
        if (!valid) {
          return this.$message.error('请添写必要的表单项！')
        }
        //执行添加商品业务逻辑 
        // lodash cloneDeep(obj) 深拷贝操作
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态参数
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        console.log(this.manyTableData)
        console.log(this.onlyTableData)
        // console.log(this.addForm.attrs)
        form.attrs = this.addForm.attrs

        //发起添加商品请求 商品名称必须唯一的

        this.$http.post('goods', form).then(res => {
          if (res.data.meta.status !== 201) {
            return this.$message.error('添加商品失败！')
          }

          this.$message.success('添加商品成功')
          this.$router.push('/goods')
        })
        console.log(form)
      })
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return nill
    }
  },
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewImg {
  width: 100%;
}

.btnAdd {
  margin-top: 15px;
}
</style>
